Detecting Flaring Structures in Sagittarius A* with (Sub)Millimeter VLBI

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dc.creatorFish, Vincent L.
dc.creatorDoeleman, Sheperd S.
dc.creatorBroderick, Avery E.
dc.creatorLoeb, Abraham
dc.creatorRogers, Alan E. E.
dc.date2008-07-15
dc.date.accessioned2026-07-07T09:50:31Z
dc.date.available2026-07-07T09:50:31Z
dc.descriptionMultiwavelength monitoring observations of Sagittarius A* exhibit variability on timescales of minutes to hours, indicating emission regions localized near the event horizon. (Sub)Millimeter-wavelength VLBI is uniquely suited to probe the environment of the assumed black hole on these scales. We consider a range of orbiting hot-spot and accretion-disk models and find that periodicity in Sgr A* flares is detectable using closure quantities. Our methods are applicable to any model producing source structure changes near the black hole, including jets and magnetohydrodynamic disk instabilities, and suggest that (sub)millimeter VLBI will play a prominent role in investigating Sgr A* near the event horizon.
dc.description4 pages PDF including 1 color figure, accepted for presentation at the XXIX URSI General Assembly
dc.identifierhttps://arxiv.org/abs/0807.2427
dc.identifierhttp://arxiv.org/abs/0807.2427
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/164965
dc.subjectAstrophysics
dc.titleDetecting Flaring Structures in Sagittarius A* with (Sub)Millimeter VLBI
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